Add CI Docker image with Go 1.23 + Node 22 pre-installed, update workflow to use go-react label

.gitea/workflows/dev.yml

@@ -13,16 +13,11 @@ env:
 
 jobs:
   test-and-build:
-    runs-on: ubuntu-dotnet
+    runs-on: go-react
 
     steps:
       - uses: actions/checkout@v4
 
-      - name: Setup Go
-        run: |
-          curl -sL https://go.dev/dl/go1.23.6.linux-amd64.tar.gz | tar -C /usr/local -xz
-          echo "/usr/local/go/bin" >> $GITHUB_PATH
-
       - name: Run backend tests
         run: go test ./...
         working-directory: ./go-backend
@@ -31,11 +26,6 @@ jobs:
         run: go build -ldflags="-w -s" -o /tmp/server ./cmd/server
         working-directory: ./go-backend
 
-      - name: Setup Node
-        run: |
-          curl -sL https://deb.nodesource.com/setup_22.x | bash -
-          apt-get install -y nodejs
-
       - name: Install frontend deps
         run: npm ci
         working-directory: ./frontend
@@ -51,7 +41,7 @@ jobs:
   docker-build-push:
     needs: test-and-build
     if: gitea.event_name == 'push'
-    runs-on: ubuntu-dotnet
+    runs-on: go-react
 
     steps:
       - uses: actions/checkout@v4